normrnd --> randn

I replaced normrnd(0,1,n-1,1) with randn(n-1,1).
They both generate a vector of random numbers from the standard normal distribution (mean=0, std=1) but randn is included in the basic Matlab installation, while normrnd requires an additional toolbox.

Files added

After 5 months an user pointed out to me that the first release contains only the file README.md lol
My fault, I hope this new one will be ok

1.0

Initial release